公开(公告)号：US20170169256A1

公开(公告)日：2017-06-15

申请号：US15432601

申请日：2017-02-14

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Hyuck-Jun CHO ,  Donald NA ,  Seung-Hwan BAEK ,  Jae-Keun OH ,  Kee-Moon CHUN

IPC: G06K7/00 ,  G06K19/07

CPC classification number: G06K7/0021 ,  G06F1/00 ,  G06F1/06 ,  G06F1/3287 ,  G06K19/07 ,  G06K19/0701 ,  G06K19/0715 ,  G06Q20/341 ,  Y02D10/171 ,  Y02D50/20

Abstract: A smart card may include data storage and transmission circuitry, a plurality of voltage controllers to supply operational power to card circuitry, a plurality of oscillators to supply an internal clock for the card, and power management circuitry. The power management circuitry may be configured to shut down the oscillators and at least one, but not all, voltage controllers during a period after a data transmission is completed.